<A target="_blank" href="http://xprentice.gbs.com/A55BAC/keithstric.nsf/d6plinks/KSTD-8E8LQG">Keith Strickland was looking for some examples of the MooTools framework</A> in action when he found jsFiddle, a JavaScript prototyping tool with some nice features. Keith has provided some particulars, a link, and a screen shot to explain it all.